I think all suggestions here will make a great beer, but IMO I like a little more wheat in my kolsch. I would mash at 150, and not any higher....grain of salt
My scale went out and in a bind I thought I could use the bathroom scale. Well it will not register under 25 lbs so i tried standing on it with the malts to get a weight. Problem is I can stand on it 3 times with the same amount each time and get 3 different weights. Guess I will just wing...